You have to start MSFS always with “clear sky” and then swith to “live weather” in the main world map menu (not the cockpit upper menu)
To do this :
1…start MSFS, go to the main world map menu and select “clear sky” in the flight condition
2…close MSFS
3…start MSFS go to the main world map menu and select “live weather” in the flight condition
that is it, now every flight will have live weather
Don’t forget to switch back to “clear sky” before closing MSFS this way you won’t have to do step 1 and 2
it is working for me for several days now, hope it will help most of you dear simmers
best regards
tim